ENGINEERING THERMODYNAMICS QUIZ

The ___ is obtained when carbonization of coal is carried out at 500° to 700° C.

Bituminous coal

Hard coal

Soft coal

Pulverized coal

TRUE ANSWER : ?
YOUR ANSWER : ?

An adiabatic wall is one which

Discourages thermal interaction

Permits thermal interaction

Encourages thermal interaction

Prevents thermal interaction

TRUE ANSWER : ?
YOUR ANSWER : ?

If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

Volume

Enthalpy

Temperature

Pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency

2

43835

Zero

43834

TRUE ANSWER : ?
YOUR ANSWER : ?

The efficiency of the dual combustion cycle for the same compression ratio is __________ Diesel cycle.

Greater than

Equal to

Less than

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following processes is irreversible process?

Isothermal

All of these

Adiabatic

Throttling

TRUE ANSWER : ?
YOUR ANSWER : ?

Water contained in a beaker can be made to boil by passing steam through it

At a pressure greater than atmospheric pressure

Any pressure

Not possible

At atmospheric pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following variables controls the physical properties of a perfect gas?

Volume

Temperature

Pressure

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as

Volume, if temperature is kept constant

Absolute temperature, if volume is kept constant

Temperature

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The natural solid fuel is

Anthracite coal

Wood

Coke

Pulverised coal

TRUE ANSWER : ?
YOUR ANSWER : ?

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